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Stackless Multi-BVH Traversal for CPU, MIC and GPU Ray Tracing.
In: Computer Graphics Forum, Jg. 33 (2014-02-01), Heft 1, S. 129-140
Online
academicJournal
Zugriff:
Stackless traversal algorithms for ray tracing acceleration structures require significantly less storage per ray than ordinary stack-based ones. This advantage is important for massively parallel rendering methods, where there are many rays in flight. On SIMD architectures, a commonly used acceleration structure is the MBVH, which has multiple bounding boxes per node for improved parallelism. It scales to branching factors higher than two, for which, however, only stack-based traversal methods have been proposed so far. In this paper, we introduce a novel stackless traversal algorithm for MBVHs with up to four-way branching. Our approach replaces the stack with a small bitmask, supports dynamic ordered traversal, and has a low computation overhead. We also present efficient implementation techniques for recent CPU, MIC (Intel Xeon Phi) and GPU (NVIDIA Kepler) architectures. [ABSTRACT FROM AUTHOR]
Titel: |
Stackless Multi-BVH Traversal for CPU, MIC and GPU Ray Tracing.
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Autor/in / Beteiligte Person: | Áfra, Attila T. ; Szirmay‐Kalos, László |
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Zeitschrift: | Computer Graphics Forum, Jg. 33 (2014-02-01), Heft 1, S. 129-140 |
Veröffentlichung: | 2014 |
Medientyp: | academicJournal |
ISSN: | 0167-7055 (print) |
DOI: | 10.1111/cgf.12259 |
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